{"id":"F2006B03582","name":"AD/BEA 121/18 - Rudder Control Lever","slug":"ad-bea-121-18-rudder-control-lever","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43150,"registerId":"commonwealth-F2006B03582-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEA 121/18 - Rudder Control Lever","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Beagle B121 (Pup) Series Aeroplanes\n\n \n\nAD/BEA 121/18 Rudder Control Lever 10/77\n\nApplicability: All models B121 with Rudder Control Lever P/N BE 45.10193. Requirement:  Action in accordance with Scottish Aviation SB No. B121/72. Compliance:               Within 100 hours time in service after 31 October 1977.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1977 (as indicated by the '10/77' suffix and 1977 compliance date). It has not expanded beyond its original narrow purpose of addressing a specific rudder control lever defect in a particular aircraft series. The document appears to be a historical record or archived directive."},"complexity_factors":["Extremely short document (under 150 words)","Only one defined term implicitly referenced (the part number P/N BE 45.10193)","No cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","Single, clear compliance requirement with straightforward deadline calculation","No conditional logic, exceptions, or nested provisions","Relies entirely on external technical document (Scottish Aviation SB) for actual procedural details"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of **Beagle B121 (Pup) series aeroplanes** to inspect or fix a problem with the **rudder control lever** (part number BE 45.10193). The specific work required is detailed in **Scottish Aviation Service Bulletin No. B121/72** — a technical notice from the original manufacturer.\n\n**Who it affects:** Anyone who owns, operates, or maintains a Beagle B121 aircraft with the specified rudder control lever part.\n\n**Why it matters:** Airworthiness Directives are legally binding safety instructions. If you don't comply, your aircraft is not considered airworthy — meaning you cannot legally fly it. This particular AD addresses a potential safety defect in the rudder control system, which is critical for controlling the aircraft during flight.\n\n**The deadline:** The work must be done **within 100 hours of flying time** after **31 October 1977**."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The source text itself sets a single, specific obligation for aircraft with Rudder Control Lever P/N BE 45.10193 and references Scottish Aviation SB No. B121/72. There is no indication within this document that the directive’s scope was expanded or narrowed from an earlier or different intent; the directive is narrowly focused and self-contained as presented."},"complexity_factors":["Narrow applicability (single aircraft model and single part number)","Directive delegates technical detail to an external service bulletin (SB No. B121/72) rather than specifying procedures","Clear, short compliance deadline (100 hours after a fixed date)","No multi-step regulatory scheme or conditional exemptions in the text","Enforcement and technical interpretation rely on external documents and certifiers"],"plain_english_summary":"Operators of Beagle B121 (Pup) aeroplanes fitted with Rudder Control Lever P/N BE 45.10193 must carry out the corrective work specified in Scottish Aviation Service Bulletin No. B121/72 within 100 hours TIS after 31 October 1977. This mandatory, time‑limited airworthiness directive affects only those aircraft with the specified part, places compliance and cost on the owner/operator, and leaves technical procedures to the referenced service bulletin and certificated maintenance personnel."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bea-121-18-rudder-control-lever","history":"/api/acts/ad-bea-121-18-rudder-control-lever/history","analysis":"/api/acts/ad-bea-121-18-rudder-control-lever/analysis","conflicts":"/api/acts/ad-bea-121-18-rudder-control-lever/conflicts","importantCases":"/api/acts/ad-bea-121-18-rudder-control-lever/important-cases","documents":"/api/acts/ad-bea-121-18-rudder-control-lever/documents"}}